transmitters and a new control panel, rf3-arrangementof existing equipnent and erection of new antennas proceeded rapidly. Progress then slowed as the contractor (who was to provide antenna-support construction work) encountered a shortage of personnel, equipment and supplies because of a large number of last-minute scientific construction projects. The mjor portion of the work was completed by Marah 19568 but completion of all antenna work was not accomplished until April 1956. 3. Joint Communication ~erations a. AS facilities and personnel became available, new cir- cuits and channels provided for in the JTF SEVIN communications plan were activated. Minor difficulties were experienced in establishing coordination with the distant stations involved. However, in almost every case, a short shake-down period sufficied to obtain efficient operation. Certain difficulties persisted without statement, as described later in this report. b. ~llthoughCJTF SEVEN had not implemented earlier plans to provide an integrated Joint Communication Organization, it becane evident at an early date that some such arrangement was essential, CJTF SEVEN had given CTG 7.2 IIoperationalcontrol!!of the joint communication facillties and had stated that CTG 7.4 would assist in ‘ their operation; however, the command and administrative arrangements necessary to implement this concept were not prescribed. Consequently, it was necessary to establish an operating arrangement on an informal basis, This was accomplished by agreement between the Signal Officer, TG 7.2, and the Commanding Officer, 121j3DAACS Squadron. The agre~ent